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Features
Ownership
- Who owns data value resolving? (USD?)
- Who owns usd<->mtlx synchronization? (USD?)
- Who owns the mtlx->usd conversion?
- Who owns the usd->mtlx conversion?
- Who owns validation (USD?)
- Who owns reference definitions, who owns implementations (MaterialX?), including USDPreviewSurface?
- Who owns code generation access.
- Who decides what is common material metadata? There's not a 1:1 mapping between USDShade and MaterialX so how can we drive standardisation?
Lossless interop
- Applicable USD limitations
- Assignment expressions
- Round trip:
- Mtlx -> USDShade -> Mtlx
- Mtlx -> USDShade -> *USDShade (e.g. shot override) -> *Mtlx (with the changes)
Other
- Dependency tracking, compatibility, and versioning
- Cross referenced documentation
- End-to-end colour management
- Improve MaterialX - UsdShade updates (both topology and inputs)
- USDShade with MaterialX source code
- Translation / ShaderGen independent from Hydra
- Strive for standardisation but empower diverse workflows
- Standardise new shading models
- Support workflows relying on custom USD schemas and MaterialX node definitions
- Promote MaterialX as a material description in USD
- Curate test and validation assets
- Promote and document best practices
- MaterialX blackbox references, with MaterialX overrides expressed in USD?
- General pipeline considerations
